1. 
[syn: begrimed, dingy, grimy, grubby, grungy, raunchy]
The Collaborative International Dictionary of English v.0.48:
Grimy \Grim"y\, a. [Compar. Grimier; superl. Grimiest.]
   Full of grime; begrimed; dirty; foul.
   [1913 Webster]
WordNet (r) 3.0 (2006):
grimy
    adj 1: thickly covered with ingrained dirt or soot; "a miner's
           begrimed face"; "dingy linen"; "grimy hands"; "grubby
           little fingers"; "a grungy kitchen" [syn: begrimed,
           dingy, grimy, grubby, grungy, raunchy]
Moby Thesaurus II by Grady Ward, 1.0:
23 Moby Thesaurus words for "grimy":
   besmirched, blotchy, dingy, dirty, dusty, fuliginous, grubby,
   grungy, messy, miry, muddy, murky, scruffy, slovenly, smirched,
   smirchy, smoky, smudgy, smutchy, smutty, snuffy, sooty, untidy